Everybody leans on something. To imply that non-religious people don’t need a crutch is very misleading. Money, power, sex, drugs, alcohol, other people, and material possessions are just a few examples of crutches people commonly rely on. Even atheism can become a crutch if it becomes the rationale for the addiction to an immoral lifestyle. Christians are not weak for relying on God. They are stronger for relying on something other than just themselves. Christianity ultimately provides something no flimsy substitutes really can: inner peace, forgiveness and spiritual fulfillment.
There is a quality of lightness, easiness, and in some sense blatant unseriousness that pervades Classical Christianity's dialogue with modernity. The Christian intellect has no reason to be intimidated in the presence of later-stage modernity. Christianity has seen too many 'modern eras' to be cowed by this one.